EP0163348A1 - Improvements in quartz infra-red lamps - Google Patents

Improvements in quartz infra-red lamps Download PDF

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Publication number
EP0163348A1
EP0163348A1 EP85200808A EP85200808A EP0163348A1 EP 0163348 A1 EP0163348 A1 EP 0163348A1 EP 85200808 A EP85200808 A EP 85200808A EP 85200808 A EP85200808 A EP 85200808A EP 0163348 A1 EP0163348 A1 EP 0163348A1
Authority
EP
European Patent Office
Prior art keywords
filament
lamp
infra
envelope
red
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85200808A
Other languages
German (de)
French (fr)
Inventor
Alex Leopold Halberstadt
John Albert Letchford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Group Ltd
Original Assignee
Thorn EMI PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thorn EMI PLC filed Critical Thorn EMI PLC
Publication of EP0163348A1 publication Critical patent/EP0163348A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/744—Lamps as heat source, i.e. heating elements with protective gas envelope, e.g. halogen lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/38—Seals for leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/44—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp directly applied to, or forming part of, the vessel
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H05B3/0071—Heating devices using lamps for domestic applications
    • H05B3/0076—Heating devices using lamps for domestic applications for cooking, e.g. in ovens
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H05B3/009—Heating devices using lamps heating devices not specially adapted for a particular application

Definitions

  • the present invention relates to quartz-halogen linear filament infra-red lamps.
  • Tungsten halogen linear filament lamps consisting of a tubular quartz or other high silica content glass envelope having at each end an electrical lead through sealed in a respective pinch seal.
  • the lamps have a linear tungsten filament of well established form extending between the through-leads and appropriately supported within the envelope. They are filled with a suitable fill gas to operate according to the well known tungsten halogen regenerative cycle.
  • Such lamps are generally for the purpose of illumination but have also been adapted for the purpose of heating. To that end the filament dimensions and electrical rating, are chosen to emit primarily in the infra-red. By this means lamps rated at about 350 watts to about 2.0 K watts have been produced, most of the energy being available as heat, for example for paint drying.
  • a halogen cycle infra-red lamp including a generally linear filament supported within a tubular envelope of high silica content glass having, at each end thereof : a pinch seal with an electrical lead to the respective end of the filament sealed therein; an electrical connection means for coupling said filament to an electrical power supply, said connection means being electrically connected to said electrical lead and emergent externally from said pinch seal; and a ceramic housing substantially enclosing the pinch seal to protect the seal in part from heat emitted by the filament and to assist in location of the lamp in an operating environment.
  • the electrical connection means is a spade connector.
  • the ceramic housing allows a heat transfer connection with a mating locating means in a unit in which the lamp is used and to that end it may have flat outer surfaces being, for example, rectangular in section.
  • a mating locating means in a unit in which the lamp is used and to that end it may have flat outer surfaces being, for example, rectangular in section.
  • it includes a locating flange.
  • the lamp envelope is coated along substantially its entire length and for about half of its circumference with an infra-red reflective coating.
  • a tubular envelope 1 of quartz, or other high silica content glass is sealed at each end with a respective pinch seal 2.
  • Each end of the lamp is fitted with a ceramic cap 3 but in Figure 1 the end cap is omitted from one end to show the structure within it.
  • Molybdenum foil strips 4 in the pinch seals 2 connect a contact 5 with filament lead wires 6, which terminate in screw coils 7, screwed into the end of a coil, or coiled coil, filament 8.
  • Spaced filament supports 9 are spirals of tungsten wire fitting loosely in the tube 1 and terminating axially in coils 10 which are wound .into the filament coil and mesh therewith.
  • the lamp of Figure 1 is similar to a conventional linear filament tungsten halogen lamp.
  • the filament rating and operating temperature are chosen appropriately to make the lamp operate to a greater degree in the infra-red.
  • the lamp of Figure 1 differs from the known linear filament infra-red lamp in the construction of the end connections. It is considered to be desirable, for the use in domestic electric cooker hobs mentioned hereinbefore, for the end connection to be by a push-on connection whereby electrical connection to the lamp may be by a flying-lead method, allowing it to be independent of the-.support of the lamp. For this reason a lead 11 emergent from the pinch seal is welded to an appropriate connector, in the preferred example shown, a spade connector, which forms the contact 5. Electrical connection thereto is then by an appropriate female connector.
  • the pinch seal is enclosed in a moulded ceramic housing which forms the ceramic cap 3.
  • the ceramic clearly should be able to resist the heat generated and a material such as Steatite is suitable.
  • This housing 3 differs from the prior art ceramic cap in that At substantially wholy encloses the pinch seal 2.
  • it is of generally rectangular cross section having a flange 12 at the outer end and on three sides thereof, for location purposes.
  • the housing 3 has a generally rectangular aperture 13 extending therethrough generally axially so that the pinch seal may be inserted therein with the spade terminal 5 emergent from the outer end as shown at 14. It will be appreciated that the connectors 5 need not be visibly emergent from the aperture if not required but they must be effectively emergent to a sufficient extent to allow connection to be made.
  • the apertures 13 are of sufficient size to make the pinch seal 2 a relatively loose fit therein and the lamp is then secured by filling the lower part of the aperture with a suitable cement (a high temperature cement such as Sauereisen cement), leaving clear space for the mating female connector to be inserted.
  • a suitable cement a high temperature cement such as Sauereisen cement
  • This construction is devised in part to allow rapid and convenient electrical connection in production of the cooker and also rapid and convenient location of the lamp in the element array. There is, however, a further consideration in its design, namely a beneficial construction in relation to heat dissipation in an infra-red element.
  • the ceramic housing 3 by substantially enclosing the pinch seal 2 acts in part as a heat sink and in part as a shield between the heat emitting filament 8 and the electrical connection between connector 5 and its mating connector.
  • the unit into which the lamp of Figures -1 and 2 is located is provided itself with locating casings which act as heat sinks. These are arranged to locate and contact the housing so as- to improve the heat transfer therefrom and the heat sink effect.
  • the fit of the housing 3 in these casings should, however, be sufficiently free to allow for expansion of the ceramic during operation, to prevent damage to the lamp, unless care is taken to match the respective coefficients of expansion.
  • the lamp of Figure 1 is incomplete as illustrated because the proportion of length to diameter of a typical 500 watt lamp does not facilitate illustration. To more clearly illustrate typical proportions the lamp is shown in full in side elevation in Figure 3 and in section on ZZ of Figure 3 in Figure 4.
  • 240V, 500 watt lamp is typically about 240mm total length, about 190mm envelope length and about 140mm filament length. Lamps of other ratings may be used and these would, of course, have different dimensions.
  • Figures 5a, b and c show a construction for the unit which is the subject matter of the above-mentioned patent application No.8320717. It can be seen that the ceramic housing 3 are located, with the assistance of flanges 12, in locating members 15 in a casing 16 which aids the heat sink effect. Electrical connection is in this example by female connectors 17 of which only one is shown.
  • the mounting is such that four lamps are mounted in parallel positions inside casing 16 and beneath a suitable ceramic surface 18 which is the cooking surface in conventional manner.
  • the ceramic surface 18 may be coloured, preferably red.
  • the lamp itself may have an infra-red transmissive red shield or be of the beneficial construction, for reducing emission of visible light, described in our co - pending patent application No.82 04413.
  • the lamp' described herein includes a particular internal construction and filament support, it will be appreciated that this internal construction is immaterial to the present invention and may be varied as desired.
  • the lamp is coated for substantially its entire length and about half of its circumference with a heat reflective coating which, as shown at 19 in Figure 5c, is disposed to reflect heat away from the lower part of casing 16 to the ceramic surface 18. That coating is a preferred feature of the lamp of the present invention and, referring again to Figure 1, extends between the limits shown at 20.
  • a suitable coating is a gold or rhodium coating, which is applied to the quartz by a suitable process, such as evaporation or by use of an electron beam gun, and may also require a suitable protective layer over it.
  • a suitable process such as evaporation or by use of an electron beam gun
  • aluminium oxide may be used as a suitable coating, which may for example be flame-sprayed onto the quartz envelope.
  • Another alternative suitable coating is titanium dioxide, which may be mixed with a glass frit.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Glass Compositions (AREA)
  • Led Device Packages (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Abstract

An infra-red lamp consists of a quartz tubular envelope (1) filled with a halogen gas and sealed at each end with a respective pinch seal (2). A coiled coil tungsten filament (8) is supported within the envelope (1) and is electrically connected, via a molydenum foil strip (4) and lead wires (6) within the pinch seal (2), to a connector (5) for connection to a power supply.
The coiled coil filament (8) is supported by a number of tungsten wire spirals (9) spaced along the length of the filament (8), each spiral (9) being intermeshed with the filament (8).

Description

  • The present invention relates to quartz-halogen linear filament infra-red lamps.
  • Tungsten halogen linear filament lamps have been provided, consisting of a tubular quartz or other high silica content glass envelope having at each end an electrical lead through sealed in a respective pinch seal.
  • The lamps have a linear tungsten filament of well established form extending between the through-leads and appropriately supported within the envelope. They are filled with a suitable fill gas to operate according to the well known tungsten halogen regenerative cycle.
  • Such lamps are generally for the purpose of illumination but have also been adapted for the purpose of heating. To that end the filament dimensions and electrical rating, are chosen to emit primarily in the infra-red. By this means lamps rated at about 350 watts to about 2.0 K watts have been produced, most of the energy being available as heat, for example for paint drying.
  • It has been proposed in a co-pending patent application No.8320717 in the name of THORN EMI Domestic Electrical Appliances, to use an array of such lamps disposed beneath a ceramic hob surface to provide an element unit for a cooker hob. In such an environment the conventional infra-red lamp construction, in particular the construction of the end connection, has proved to be less satisfactory than was hoped to be the case.
  • It is an object of this invention to provide an improved construction of linear filament infra-red lamp for the said purpose.
  • According to the invention there is provided a halogen cycle infra-red lamp including a generally linear filament supported within a tubular envelope of high silica content glass having, at each end thereof : a pinch seal with an electrical lead to the respective end of the filament sealed therein; an electrical connection means for coupling said filament to an electrical power supply, said connection means being electrically connected to said electrical lead and emergent externally from said pinch seal; and a ceramic housing substantially enclosing the pinch seal to protect the seal in part from heat emitted by the filament and to assist in location of the lamp in an operating environment.
  • Preferably the electrical connection means is a spade connector.
  • Preferably the ceramic housing allows a heat transfer connection with a mating locating means in a unit in which the lamp is used and to that end it may have flat outer surfaces being, for example, rectangular in section. Preferably also it includes a locating flange.
  • Preferably the lamp envelope is coated along substantially its entire length and for about half of its circumference with an infra-red reflective coating.
  • In order that the invention may be clearly understood and readily carried into effect it will now be described by way of example with reference to the aeompanying drawings, of which,
    • Figure 1 shows a linear filament tungsten halogen infra-red lamp incorporating the invention,
    • Figure 2 shows an end elevation (viewed from A) of the lamp of Figure 1,
    • Figure 3 shows in its entirety, a lamp in accordance with the invention for better illustration of its proportions,
    • Figure 4 is a -view on ZZ of Figure 3 and.
    • Figures 5a, 5b and 5c show respectively plan, end and side elevations of a cooking hob heating element unit incorporating four lamps in accordance with this invention.
  • In the lamp of Figure 1, a tubular envelope 1 of quartz, or other high silica content glass, is sealed at each end with a respective pinch seal 2. Each end of the lamp is fitted with a ceramic cap 3 but in Figure 1 the end cap is omitted from one end to show the structure within it. Molybdenum foil strips 4 in the pinch seals 2 connect a contact 5 with filament lead wires 6, which terminate in screw coils 7, screwed into the end of a coil, or coiled coil, filament 8. Spaced filament supports 9 are spirals of tungsten wire fitting loosely in the tube 1 and terminating axially in coils 10 which are wound .into the filament coil and mesh therewith.
  • As this far described the lamp of Figure 1 is similar to a conventional linear filament tungsten halogen lamp. To provide an infra-red lamp the filament rating and operating temperature are chosen appropriately to make the lamp operate to a greater degree in the infra-red.
  • The lamp of Figure 1 differs from the known linear filament infra-red lamp in the construction of the end connections. It is considered to be desirable, for the use in domestic electric cooker hobs mentioned hereinbefore, for the end connection to be by a push-on connection whereby electrical connection to the lamp may be by a flying-lead method, allowing it to be independent of the-.support of the lamp. For this reason a lead 11 emergent from the pinch seal is welded to an appropriate connector, in the preferred example shown, a spade connector, which forms the contact 5. Electrical connection thereto is then by an appropriate female connector.
  • At each end of the lamp, illustrated at the left hand end in Figure 1, the pinch seal is enclosed in a moulded ceramic housing which forms the ceramic cap 3. The ceramic clearly should be able to resist the heat generated and a material such as Steatite is suitable. This housing 3 differs from the prior art ceramic cap in that At substantially wholy encloses the pinch seal 2. Furthermore, as shown in the end elevation of Figure 2, it is of generally rectangular cross section having a flange 12 at the outer end and on three sides thereof, for location purposes.
  • The housing 3 has a generally rectangular aperture 13 extending therethrough generally axially so that the pinch seal may be inserted therein with the spade terminal 5 emergent from the outer end as shown at 14. It will be appreciated that the connectors 5 need not be visibly emergent from the aperture if not required but they must be effectively emergent to a sufficient extent to allow connection to be made. The apertures 13 are of sufficient size to make the pinch seal 2 a relatively loose fit therein and the lamp is then secured by filling the lower part of the aperture with a suitable cement (a high temperature cement such as Sauereisen cement), leaving clear space for the mating female connector to be inserted.
  • This construction is devised in part to allow rapid and convenient electrical connection in production of the cooker and also rapid and convenient location of the lamp in the element array. There is, however, a further consideration in its design, namely a beneficial construction in relation to heat dissipation in an infra-red element.
  • The ceramic housing 3 by substantially enclosing the pinch seal 2 acts in part as a heat sink and in part as a shield between the heat emitting filament 8 and the electrical connection between connector 5 and its mating connector.
  • The unit into which the lamp of Figures -1 and 2 is located is provided itself with locating casings which act as heat sinks. These are arranged to locate and contact the housing so as- to improve the heat transfer therefrom and the heat sink effect. The fit of the housing 3 in these casings should, however, be sufficiently free to allow for expansion of the ceramic during operation, to prevent damage to the lamp, unless care is taken to match the respective coefficients of expansion.
  • The lamp of Figure 1 is incomplete as illustrated because the proportion of length to diameter of a typical 500 watt lamp does not facilitate illustration. To more clearly illustrate typical proportions the lamp is shown in full in side elevation in Figure 3 and in section on ZZ of Figure 3 in Figure 4.
  • Thus 240V, 500 watt lamp is typically about 240mm total length, about 190mm envelope length and about 140mm filament length. Lamps of other ratings may be used and these would, of course, have different dimensions.
  • An element unit for a cooker hob, incorporating four 500 watt lamps is shown in plan, end and side elevation in Figures 5a, 5b and 5c respectively.
  • Except insofar as these Figures show lamps according to this invention and as described herein, Figures 5a, b and c show a construction for the unit which is the subject matter of the above-mentioned patent application No.8320717. It can be seen that the ceramic housing 3 are located, with the assistance of flanges 12, in locating members 15 in a casing 16 which aids the heat sink effect. Electrical connection is in this example by female connectors 17 of which only one is shown.
  • The mounting is such that four lamps are mounted in parallel positions inside casing 16 and beneath a suitable ceramic surface 18 which is the cooking surface in conventional manner.
  • To prevent excessive emission of visible light the ceramic surface 18 may be coloured, preferably red. However the lamp itself may have an infra-red transmissive red shield or be of the beneficial construction, for reducing emission of visible light, described in our co-pending patent application No.82 04413.
  • Although the lamp' described herein includes a particular internal construction and filament support, it will be appreciated that this internal construction is immaterial to the present invention and may be varied as desired.
  • In the construction shown in Figures 5a, b and c it is found beneficial if the lamp is coated for substantially its entire length and about half of its circumference with a heat reflective coating which, as shown at 19 in Figure 5c, is disposed to reflect heat away from the lower part of casing 16 to the ceramic surface 18. That coating is a preferred feature of the lamp of the present invention and, referring again to Figure 1, extends between the limits shown at 20.
  • A suitable coating is a gold or rhodium coating, which is applied to the quartz by a suitable process, such as evaporation or by use of an electron beam gun, and may also require a suitable protective layer over it. Alternatively aluminium oxide may be used as a suitable coating, which may for example be flame-sprayed onto the quartz envelope. Another alternative suitable coating is titanium dioxide, which may be mixed with a glass frit.

Claims (8)

1. An infra-red lamp including a tungsten filament (8) supported within a sealed tubular envelope (1), said envelope (1) being formed from a high silica content glass and filled with a halogen gas, and characterised in that said tungsten filament (8) consists of a coiled coil filament.
2. A lamp as claimed in claim 1 wherein said coiled coil filament (8) is supported by a number of wire spirals (9) spaced along the length of said filament (8).
3. A lamp as claimed in claim 2 wherein said spirals '(9) are intermeshed with said coiled coil filament (8).
4. A lamp as claimed in claim 2 or 3 wherein said spirals (9) are formed from tungsten wire.
5. A lamp as claimed in any preceding claim wherein each end of said envelope (1) is provided with a pinch seal having sealed therein a connection between an electrical lead (6) to the respective end of said filament (8) and electrical connection means (5) for coupling said filament (8) to an electrical power supply.
6. A lamp as claimed in claim 5 wherein said electrical lead (6) and said electrical connection means (5) are connected via a strip (4) of molybdenum foil.
7. A heating unit for use in a cooking hob, said unit incorporating at least one infra-red lamp as claimed in any preceding claim.
8. A cooking hob including a ceramic upper- surface (18), below which at least one heating unit as claimed in claim 8 is mounted.
EP85200808A 1983-03-24 1984-03-12 Improvements in quartz infra-red lamps Withdrawn EP0163348A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838308103A GB8308103D0 (en) 1983-03-24 1983-03-24 Quartz infra-red lamps
GB8308103 1983-03-24

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP84301636.1 Division 1984-03-12
EP84301636A Division EP0120639A3 (en) 1983-03-24 1984-03-12 Improvements in quartz infra-red lamps

Publications (1)

Publication Number Publication Date
EP0163348A1 true EP0163348A1 (en) 1985-12-04

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EP84301636A Ceased EP0120639A3 (en) 1983-03-24 1984-03-12 Improvements in quartz infra-red lamps
EP85200808A Withdrawn EP0163348A1 (en) 1983-03-24 1984-03-12 Improvements in quartz infra-red lamps

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Application Number Title Priority Date Filing Date
EP84301636A Ceased EP0120639A3 (en) 1983-03-24 1984-03-12 Improvements in quartz infra-red lamps

Country Status (12)

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US (1) US4598194A (en)
EP (2) EP0120639A3 (en)
JP (1) JPS59180958A (en)
AU (1) AU562416B2 (en)
CA (1) CA1225115A (en)
DK (1) DK161884A (en)
FI (1) FI841090A (en)
GB (1) GB8308103D0 (en)
GR (1) GR81913B (en)
NO (1) NO841174L (en)
NZ (1) NZ207620A (en)
ZA (1) ZA842092B (en)

Cited By (8)

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Publication number Priority date Publication date Assignee Title
EP0222553A2 (en) * 1985-11-09 1987-05-20 THORN EMI plc Tungsten-Halogen lamp
EP0129344B1 (en) * 1983-05-25 1988-08-24 THORN EMI Patents Limited Heating apparatus
EP0131372B1 (en) * 1983-06-15 1989-05-31 THORN EMI Patents Limited Heating apparatus
EP0364191A1 (en) * 1988-10-13 1990-04-18 Elva Induksjon A.S. A method of joining structural elements by heating of a binder
EP0949659A2 (en) * 1998-04-09 1999-10-13 General Electric Company Lamp filament
DE10029437A1 (en) * 2000-06-21 2002-01-10 Heraeus Noblelight Gmbh infrared Heaters
DE10041564A1 (en) * 2000-08-24 2002-03-21 Heraeus Noblelight Gmbh Coolable infrared radiator element
EP1895624A2 (en) * 2006-08-29 2008-03-05 Star Progetti Tecnologie Applicate SPA Infrared heat irradiating device

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US4700051A (en) * 1984-09-22 1987-10-13 E.G.O. Elektro-Gerate Blanc U. Fischer Radiant heater for cooking appliances
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US5517005A (en) * 1988-05-19 1996-05-14 Quadlux, Inc. Visible light and infra-red cooking apparatus
GB8926139D0 (en) * 1989-11-18 1990-01-10 Emi Plc Thorn Tungsten halogen lamp
GB2278722A (en) * 1993-05-21 1994-12-07 Ea Tech Ltd Improvements relating to infra-red radiation sources
US5382805A (en) * 1993-11-01 1995-01-17 Fannon; Mark G. Double wall infrared emitter
GB2305585B (en) * 1995-03-09 1999-02-10 Ge Lighting Ltd Heat source
US5990454A (en) * 1997-09-23 1999-11-23 Quadlux, Inc. Lightwave oven and method of cooking therewith having multiple cook modes and sequential lamp operation
US5958271A (en) * 1997-09-23 1999-09-28 Quadlux, Inc. Lightwave oven and method of cooking therewith with cookware reflectivity compensation
US6013900A (en) * 1997-09-23 2000-01-11 Quadlux, Inc. High efficiency lightwave oven
US6399955B1 (en) 1999-02-19 2002-06-04 Mark G. Fannon Selective electromagnetic wavelength conversion device
US7522822B2 (en) * 2004-01-06 2009-04-21 Robert Trujillo Halogen lamp assembly with integrated heat sink
CN100582564C (en) * 2004-09-16 2010-01-20 皇家飞利浦电子股份有限公司 Lamp assembly with lamp and reflector
GB2431041A (en) * 2005-10-08 2007-04-11 David Horsfield Lamp heat sink
FR2896942B1 (en) * 2006-01-27 2014-03-14 Thermor Ind "ELECTRICAL HEATING DEVICE"
JP5132392B2 (en) * 2008-03-31 2013-01-30 ニチアス株式会社 Lamp and heating device
JP4821819B2 (en) * 2008-08-26 2011-11-24 ウシオ電機株式会社 Filament lamp and light irradiation type heat treatment equipment
US8538249B2 (en) * 2009-10-20 2013-09-17 General Electric Company Broiler for cooking appliances
JP2014232645A (en) * 2013-05-29 2014-12-11 ウシオ電機株式会社 Filament lamp

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129344B1 (en) * 1983-05-25 1988-08-24 THORN EMI Patents Limited Heating apparatus
EP0131372B1 (en) * 1983-06-15 1989-05-31 THORN EMI Patents Limited Heating apparatus
EP0222553A3 (en) * 1985-11-09 1989-06-07 THORN EMI plc Tungsten-Halogen lamp
EP0222553A2 (en) * 1985-11-09 1987-05-20 THORN EMI plc Tungsten-Halogen lamp
EP0364191A1 (en) * 1988-10-13 1990-04-18 Elva Induksjon A.S. A method of joining structural elements by heating of a binder
EP0949659A2 (en) * 1998-04-09 1999-10-13 General Electric Company Lamp filament
EP0949659A3 (en) * 1998-04-09 1999-12-29 General Electric Company Lamp filament
US6469426B1 (en) 1998-04-09 2002-10-22 General Electric Company Incandescent lamp having a helical coil that comprises multiple sections of different pitches
DE10029437B4 (en) * 2000-06-21 2005-11-17 Heraeus Noblelight Gmbh Infrared radiator and method for operating such an infrared radiator
DE10029437A1 (en) * 2000-06-21 2002-01-10 Heraeus Noblelight Gmbh infrared Heaters
USRE40181E1 (en) * 2000-06-21 2008-03-25 Heraeus Noblelight Gmbh Infrared radiator with carbon fiber heating element centered by spacers
US6591062B2 (en) 2000-06-21 2003-07-08 Heraeus Noblelight Gmbh Infrared radiator with carbon fiber heating element centered by spacers
DE10041564A1 (en) * 2000-08-24 2002-03-21 Heraeus Noblelight Gmbh Coolable infrared radiator element
US6713945B2 (en) 2000-08-24 2004-03-30 Heraeus Noblelight Gmbh Coolable infrared radiator element of quartz glass
DE10041564C2 (en) * 2000-08-24 2002-06-27 Heraeus Noblelight Gmbh Coolable infrared radiator element
EP1895624A2 (en) * 2006-08-29 2008-03-05 Star Progetti Tecnologie Applicate SPA Infrared heat irradiating device
EP1895624A3 (en) * 2006-08-29 2012-08-08 Star Progetti Tecnologie Applicate SPA Infrared heat irradiating device

Also Published As

Publication number Publication date
DK161884A (en) 1984-09-25
CA1225115A (en) 1987-08-04
AU562416B2 (en) 1987-06-11
GR81913B (en) 1984-12-12
US4598194A (en) 1986-07-01
FI841090A0 (en) 1984-03-19
AU2559784A (en) 1984-09-27
JPS59180958A (en) 1984-10-15
GB8308103D0 (en) 1983-05-05
NZ207620A (en) 1987-06-30
NO841174L (en) 1984-09-25
EP0120639A3 (en) 1985-05-29
EP0120639A2 (en) 1984-10-03
FI841090A (en) 1984-09-25
ZA842092B (en) 1986-04-30
DK161884D0 (en) 1984-03-21

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